PERMFILE48355

• Permit No: C1996083A
• IBM Index Class Name: Permit File
• Doc Date: 3/23/2004
• Doc Name: Appendix A to Appendix C - Report Dated 11/10/03
• Section_Exhibit Name: Coal Mine Waste Disposal Area No. 2
• Media Type: D
• Archive: Yes

SEDCAD 4 for Windows
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9
Structure #21 Ri rap Channel)
D-F21
Trapezoidal Riprap Channel Inputs:
Material: Riprap
Left
Bottom Right Freeboard Freeboard Freeboard
Sideslope
Width (R)} Ratio Sideslope
Ratio Slope (%)
Depth (R) % of Depth Mult. x
(VxD)
3.00 1.5:1 1.5:1 10.0 1.00
Riprap Channel Results:
Simons/OSM Method -Steep Slope Design
w/o Freeboard w/ Freeboard
Design Discharge: 11.88 ds
Depth: 0.26 ft 1.26 R
Top Width: 3.79 R 6.79 R
Velocity*:
X-Section Area: 0.90 sq ft
Hydraulic Radius: 0.227
Froude Number*:
Manning's n*:
Dmin: 4.00 in
D60: 12.00 in
Dmax: 15.00 in
Velocity and Manning's n wlculatlons may not apply for this method.
Structure #18 (Erodib/e Channel1
D-FIB
Triangular Erodible Channel Inputs:
Material: Shales and hardpans
Left Right Freeboard Freeboard Freeboard Limiting
Sideslope Sideslope Slope (%) Manning's n Mult. x Velocity
Ratio Ratio Depth (ft) % of Depth NxD) (fps)
2.0:1 20.0:1 2.0 0.0250 0.30 6.0
Erodible Channel Results:
i•
Filename: GobPileDitches.sc4
w/o Freeboard w/ Freeboard
Design Discharge: 1.49 ds
Depth: 0.25 R 0.55 R
Printed 10.29-21X)3
App-B - 17 - 11103